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RoHS Compliant Light Dependent Resistor (LDR) CdS Photocell
These photoresistors are manufactured to detect light within the visible light spectrum’s 400 to 700nm range. Their resistance decreases as the light intensity increases, showcasing efficiency characteristics akin to the human eye. These Light-Dependent Resistors (LDR) are highly versatile and available in a wide array of resistance values. They are available in a two-leaded plastic-coated ceramic header or hermetically sealed TO metal cans, catering to diverse application needs.
■Analog Applications:
● Camera Exposure Control
● Auto Slide Focus - dual cell
● Photocopy Machines - density of toner
● Colorimetric Test Equipment
● Densitometer
● Electronic Scales - dual cell
● Automatic Gain Control - modulated light source
● Automated Rear View Mirro
■Digital Applications:
● Automatic Headlight Dimmer
● Night Light Control
● Oil Burner Flame Out
● Street Light Control
● Absence / Presence (beam breaker)
● Position Sensor
■Absolute Maximum Rating:
| Symbol | Parameter | Min | Max | Unit |
| Vpk | DC Voltage Applied | / | V | |
| Pd | Power Dissipation at 25℃ | / | mW | |
| To | Operating and storage temperature | -30 | +70 | ℃ |
| Ts | Soldering Temperature* | / | 260 | ℃ |
*0.118 inch from base for 3seconds with heat sink
■Electro-optical characteristics rating (Ta=25 ℃ unless otherwise noted)
| Symbol | Characteristics | Text Conditions | Min | Typ | Max | Units |
| RD | Dark Resistance | After 10 sec.Ev=0Lux @2856°K | / | / | MΩ | |
| RL | Light Resistance | Ev=10Lux @2856°K | / | KΩ | ||
| S | Sensitivity |  |
/ | Ω/LUX | ||
| 入 Range | Spectral Application Range | Flooded | 350 | / | 750 | nm |
| 入 Peak | Spectral Application Range | Flooded | / | / | nm | |
| Tr | Rise Time | Ev=10Lux @2856°K | / | / | mS | |
| Tf | Fall Time | After 10Lux @2856°K | / | / | mS |
** R100 , R10: photocell resistances at 100Lux and 10Lux at 2856°k respectively.
** E100 , E10: Iuminances at 100Lux and 10Lux at 2856°k respectively.
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